diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 1fdfc7f9634c03d2e4ee75c7b39549b3673491e3..f823aa0dd1ced1e1b30d1a513d1040d1f177e18d 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -33,7 +33,8 @@
 - [ ] My change requires a change to the documentation and I have updated the documentation accordingly.
 - [ ] I have added tests to cover my changes.
 - [ ] I have added myself to the [.zenodo.json](https://github.com/USGS-Astrogeology/ISIS3/blob/dev/.zenodo.json) document.
-- [ ] I have added any user impacting changes to the [CHANGELOG.md](https://github.com/USGS-Astrogeology/ISIS3/blob/dev/CHANGELOG.md) document.
+- [ ] I have added my user impacting change to the [CHANGELOG.md](https://github.com/USGS-Astrogeology/ISIS3/blob/dev/CHANGELOG.md) document. <!--- NOTE: You can only have one changelog entry per PR, see https://github.com/DOI-USGS/ISIS3/blob/dev/CONTRIBUTING.md -->
+
 
 ## Licensing
 This project is mostly composed of free and unencumbered software released into the public domain, and we are unlikely to accept contributions that are not also released into the public domain. Somewhere near the top of each file should have these words:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 313a1c127881ba084456968ea008df3a3b3d62a7..5fb9f2a9342221711409555bd2a1c4e61c1192f6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -43,6 +43,9 @@ In the case of an objection being raised in a pull request by another committer,
 committers should seek to arrive at a consensus by way of addressing concerns being expressed
 by discussion, compromise on the proposed change, or withdrawal of the proposed change.
 
-When making a bug fix contribution, please add the [bug](https://github.com/USGS-Astrogeology/ISIS3/pulls?q=is%3Apr+label%3Abug+) label to your pull request. This will automatically cherry-pick your PR into the latest release branch so that it can be distributed in the next bug fix release.
+When making a bug fix contribution, please add the [bug](https://github.com/USGS-Astrogeology/ISIS3/pulls?q=is%3Apr+label%3Abug+) label to your pull request. This will automatically cherry-pick your PR into the latest release branch so that it can be distributed in the next bug fix release. 
+
+Every pull request making changes to ISIS's source needs a [changelog entry](https://raw.githubusercontent.com/DOI-USGS/ISIS3/dev/CHANGELOG.md). PRs are limited to one changelog entry per PR. If you have multiple bug fixes or feature adds, they should be split up. If PRs need to be merged in a particular order, include that as a comment on your PRs. If PR is one changelog, but high-volume changes such as large feature branches (many changes across many files requiring several hours of review time), then the PR isn't guaranteed to be reviewed promptly. Authors should contact the repo owners, see [code.json](https://github.com/DOI-USGS/ISIS3/blob/dev/code.json), to coordinate reviews outside typical USGS Astro support hours. We plan out our schedules in 6 week increments, so plan to coordinate with repo owners a minimum of 6 weeks before you expect the changes to be ready. 
 
 When making a contribution for the first time, please add your name to the `.zenodo.json file.` We strongly recommend adding your affiliation and ORCiD to the `zenodo.json` file. These additions only have to happen once.
+